Multipartite Entanglement and Quantum State Exchange

Details Multipartite Entanglement and Quantum State Exchange Multipartite Entanglement and Quantum State Exchange

2002-08-14

arxiv.org/abs/quant-ph/0208098v2

Phys. Rev. A 67, 052107 (2003)

Physics

Quantum Physics

12 pages, 4 figures

Scientific paper

10.1103/PhysRevA.67.052107

We investigate multipartite entanglement in relation to the theoretical process of quantum state exchange. In particular, we consider such entanglement for a certain pure state involving two groups of N trapped atoms. The state, which can be produced via quantum state exchange, is analogous to the steady-state intracavity state of the subthreshold optical nondegenerate parametric amplifier. We show that, first, it possesses some 2N-way entanglement. Second, we place a lower bound on the amount of such entanglement in the state using a novel measure called the entanglement of minimum bipartite entropy.

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